I dunno. 50-cal BMG ammo is going for $3.99 a round (tracer...I think ball ammo is a little less) on Cheaper Than Dirt's website...I doubt Canada's defense ministry would be willing to part with the kind of money it would take to feed a Ma Deuce. Maybe someting more of the rubber band powered variety?
Scouts Out! Cavalry Ho!
$3.99 a round!
That is definitely too expensive for the frogs in charge of our neighbor to the north.
Maybe they can switch to pea shooters, I don't think the Canadian military has effected a combat casualty on an enemy since WWII anyway.